Assuming you don’t put your faith in ancient weapons and hokey religions, your only option is to pack a good blaster at your side - and what better blaster than Han Solo’s very own DL-44?
And now it could be yours, if you have at least $300,000 to spend. Yes, the 275mm long prop used by Harrison Ford and, it’s claimed, Mark …

Re: "First doesn't enter into it"

The difference with the moon landings is that it is a reasonable bet that someone else will land there someday. Scope is the entire period of time during which the human species exists. Therefore 'first' can be used, though currently 'only' would also be applicable. With the Han/Greedo scene we know that there is no more shooting between Han's shot and the end of the scene, so first is rather pointless.

Z: "Imagine I have a blaster ray in my hand"

Bah!

That Droid Retirer doesn't look kosher to me. I've a poor "garage kit" copy of my own and bad as it is it looks closer to what I see in Deckard's hand than that lump of undifferentiated black resin.

For those needing a good start for their own Solo blaster, there's a more-than OK softair broomhandle Mauser that would make an excellent chassis for it that can be had for less than 10 dollars from Amazon.

These look like castings for stunt guns

These definitely aren't the hero guns. That would deserve this kind of price.

I highly doubt the authenticity as well, as the castings for the rubber stunt guns are quite prolific for the blade runner gun apparently. Not to mention most of the castings where made before the compleition and refinement of the hero weapons.